The girl faces one charge of making a "terroristic threat," a misdemeanor in New Jersey. The crime requires a threat to commit any act of violence with the intent to terrorize, or "in reckless disregard of the risk of causing" terror or inconvenience.

The girl told investigators she had no intention to cause harm with her Facebook threat, CBS News reports. But police seem to be focusing on the "reckless disregard" part of the statute.

"You absolutely cannot be posting something that is going to potentially terrorize people by their simply reading it and being concerned about showing up at high school," Chief Fox told CBS.

The girl acted alone, and no other students were arrested, Fox said.

The school district's superintendent told parents in an email the district "has taken the appropriate actions and precautions," adding there was "no perceived danger at this time" stemming from the girl's Facebook threat.